@article{c6f12f28713f4e39829b7ed5347ce078,
title = "The radio structure of the peculiar narrow-line Seyfert 1 galaxy candidate J1100+4421",
abstract = "Narrow-line Seyfert 1 galaxies (NLS1) are an intriguing subclass of active galactic nuclei. Their observed properties indicate low central black hole mass and high accretion rate. The extremely radio-loud NLS1 sources often show relativistic beaming and are usually regarded as younger counterparts of blazars. Recently, the object SDSS J110006.07+442144.3 was reported as a candidate NLS1 source. The characteristics of its dramatic optical flare indicated its jet-related origin. The spectral energy distribution of the object was similar to that of the γ -ray detected radio-loud NLS1, PMNJ0948+0022. Our high-resolution European very long baseline interferometry network observations at 1.7 and 5 GHz revealed a compact core feature with a brightness temperature of ≳1010 K. Using the lowest brightness temperature value and assuming a moderate Lorentz factor of ~9, the jet viewing angle is ≲26°. Archival Very Large Array data show a large-scale radio structure with a projected linear size of ~150 kpc reminiscent of double-sided morphology.",
keywords = "Galaxies: Seyfert, Galaxies: active, Galaxies: individual: SDSS J110006.07+442144.3",
author = "K. Gab{\'a}nyi and S. Frey and Z. Paragi and E. J{\"a}rvel{\"a} and T. Morokuma and T. An and M. Tanaka and I. Tar",
note = "Funding Information: We thank the referee for careful reading of the manuscript and for his/her comments, which helped to improve the paper. KEG was supported by the J{\'a}nos Bolyai Research Scholarship of the Hungarian Academy of Sciences. We wish to thank Venkatessh Ramakrishnan for the help with the Fermi data reduction. The European VLBI Network is a joint facility of independent European, African, Asian and North American radio astronomy institutes. Scientific results from data presented in this publication are derived from the following EVN project code: EG087. The e-VLBI research infrastructure in Europe was supported by the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement RI-261525 NEXPReS. The research leading to these results has received funding from the European Commission Seventh Framework Programme(FP/2007-2013) under grant agreement no. 283393 (RadioNet3). This research was supported by the Hungarian National Research Development and Innovation Office (OTKA NN110333) and the China-Hungary Collaboration and Exchange Programme by the International Cooperation Bureau of the Chinese Academy of Sciences (CAS). TA acknowledges the grant of the Youth Innovation Promotion Association of CAS. Funding Information: We thank the referee for careful reading of the manuscript and for his/her comments, which helped to improve the paper. KEG was supported by the J?nos Bolyai Research Scholarship of the Hungarian Academy of Sciences. We wish to thank Venkatessh Ramakrishnan for the help with the Fermi data reduction. The European VLBI Network is a joint facility of independent European, African, Asian and North American radio astronomy institutes. Scientific results from data presented in this publication are derived from the following EVN project code: EG087. The e-VLBI research infrastructure in Europe was supported by the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement RI-261525 NEXPReS. The research leading to these results has received funding from the European Commission Seventh Framework Programme(FP/2007-2013) under grant agreement no. 283393 (RadioNet3). This research was supported by the Hungarian National Research Development and Innovation Office (OTKA NN110333) and the China-Hungary Collaboration and Exchange Programme by the International Cooperation Bureau of the Chinese Academy of Sciences (CAS). TA acknowledges the grant of the Youth Innovation Promotion Association of CAS. Publisher Copyright: {\textcopyright} 2017 The Authors.",
year = "2018",
month = jan,
doi = "10.1093/mnras/stx2449",
language = "English",
volume = "473",
pages = "1554--1561",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",
}